Answer:
D. Diaphragm is the muscle below our lungs that helps with respiration (breathing).
Explanation:
Aerobic activities make you breathe harder and make your heart and blood vessels healthier. These include:
Walking
Dancing
Swimming
Water aerobics
Jogging and running
Aerobic exercise classes
Bicycle riding (stationary or on a path)
Some gardening activities, such as raking and pushing a lawn mower
Tennis
Golfing (without a cart)
The correct answer is C.
An author's credentials can determine a health source's credibility. None of the other options would apply to credibility. When it comes to health, if you want to make sure that what you are researching or reading is authentic and reliable you need to find out whether the author is a professional health expert or not. You can do this by finding out their credentials.
